Epsilon Crateris

ε Crateris
Location of ε Crateris (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Crater
Right ascension 11h 24m 36.59019s[1]
Declination −10° 51′ 33.5591″[1]
Apparent magnitude (V) 4.84[2]
Characteristics
Spectral type K5 III[3]
U−B color index +1.87[2]
B−V color index +1.55[2]
Astrometry
Radial velocity (Rv)+2.0±0.6[4] km/s
Proper motion (μ) RA: −25.65[1] mas/yr
Dec.: +24.96[1] mas/yr
Parallax (π)8.9013 ± 0.2019 mas[5]
Distance366 ± 8 ly
(112 ± 3 pc)
Absolute magnitude (MV)−0.43±0.18[6]
Details
Mass0.99±0.08[6] M☉
Radius44.7[7] R☉
Luminosity391[8] L☉
Surface gravity (log g)1.61[9] cgs
Temperature3,930[9] K
Metallicity [Fe/H]−0.38[9] dex
Rotational velocity (v sin i)10[10] km/s
Other designations
ε Crt, 14 Crateris, BD−10° 3260, HD 99167, HIP 55687, HR 4402, SAO 156658.[11]
Database references
SIMBADdata
Image showing the constellation Crater as a bowl, with ε marking the rim

Epsilon Crateris (ε Crateris) is a solitary[12] star in the southern constellation of Crater. Visible to the naked eye, it has an apparent visual magnitude of 4.84.[2] It is located in the sky above Beta Crateris, and slightly to the left, or east, marking the lower right edge of the rim of the bowl and is somewhat closer to Theta Crateris, which is further east at the top of the bowl. With an annual parallax shift of 8.67[1] mas as seen from the Earth, its estimated distance is around 376 light years from the Sun.

This is an evolved K-type giant star with a stellar classification of K5 III.[3] It has about the same mass as the Sun, but has expanded to 44.7[7] times the Sun's radius. The star is radiating 391[8] times the solar luminosity from its outer atmosphere at an effective temperature of 3,930 K.[9]

  1. ^ a b c d e Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  6. ^ a b Cite error: The named reference daSilva2006 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Setiawan2004 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference McWilliam1990 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Bernacca1970 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).